We present a method for the computation of the renormalized group beta-functions and the central charge in two-dimensional supersymmetric sigma models in a gravitational background. The two-loops results are exhibited. We use the Pauli-Villars regularization which preserves supersymmetry and permits an unambiguous treatment of the model with torsion. The central charge we derive for a general manifold is in agreement with expression found on group manifolds.
|Autori:||Guadagnini, Enore; Mintchev, M.|
|Titolo:||Beta functions and central charge of supersymmetric sigma models with torsion|
|Anno del prodotto:||1987|
|Digital Object Identifier (DOI):||10.1016/0370-2693(87)90275-9|
|Appare nelle tipologie:||1.1 Articolo in rivista|